Air bag with air escape valve

Abstract

The utility model discloses an air bag with an air escape valve. The air bag comprises an air bag body, one end of the air bag body is provided with a first exhaust port, the other end of the air bag body is further provided with a second exhaust port, the second exhaust port is provided with an air release valve, the air release valve comprises an air guide bag and a fixing rope, the air guide bag fixedly covers the second exhaust port, one end of the air guide bag is provided with an opening, and the fixing rope is provided with a fixing rope. The second exhaust port is communicated with the opening; one end of the fixing rope is at least divided into two strands to form two branch ropes, and the two branch ropes are fixedly arranged on the two sides of the opening respectively; the device further comprises a telescopic rod, one end of the fixing rope is separably arranged on the telescopic rod in a tensioning and sleeving mode, and the telescopic rod is provided with a driving device enabling the telescopic rod to stretch out and draw back. When the fixing rope is arranged on the telescopic rod in a sleeving mode, the opening is in a closed state, and when the fixing rope is separated from the telescopic rod, the opening is in an open state. And the air bag forms a softer buffer surface through rapid exhaust.

Description

Technical Field

[0001] This utility model relates to the field of airbag technology, and in particular to an airbag with a deflation valve. Background Technology

[0002] Currently, the design of automotive passive safety systems is primarily based on the premise that occupants are wearing seat belts. The seat belts absorb most of the inertial force generated during a collision, while airbags counteract the remaining inertial force, thus protecting the occupants. However, in actual use, if occupants are not wearing seat belts, they will be thrown forward at a high speed during a collision.

[0003] Furthermore, existing airbags typically have only a single vent. After the airbag inflates, if the deflation speed is slow, the airbag will form a relatively hard buffer surface. When an occupant impacts the airbag at high speed, the airbag will rebound like a spring, generating a large reaction force on the occupant, which may cause injuries to the head, neck, and other parts of the body. In this case, the airbag not only fails to provide effective protection for the occupant, but may also cause secondary injuries to the occupant, further aggravating the severity of the injury.

[0004] Therefore, existing airbag systems have significant drawbacks when occupants are not wearing seat belts, and fail to effectively adapt to the demands of high-speed impacts. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides an airbag with a deflation valve, which can effectively solve the problems existing in the prior art.

[0006] The technical solution of this utility model is:

[0007] According to one aspect of this utility model, it includes: an airbag body, one end of which is provided with a first exhaust port, and the other end of which is provided with a second exhaust port. The second exhaust port is equipped with a deflation valve, which includes an air guide bag and a fixing rope. The air guide bag is fixedly covered outside the second exhaust port, and one end of the air guide bag is provided with an opening, which is connected to the second exhaust port. One end of the fixing rope is divided into at least two strands to form two branch ropes, which are respectively fixed on both sides of the opening. It also includes a telescopic rod, one end of which is detachably tensioned and sleeved on the telescopic rod. The telescopic rod is equipped with a driving device for extending and retracting. When the fixing rope is sleeved on the telescopic rod, the opening is closed, and when the fixing rope is separated from the telescopic rod, the opening is open.

[0008] Furthermore, the air guide bag is fixed to the airbag body by sewing.

[0009] Furthermore, the air guide bag has a narrow opening and wide cavity structure, and the width of the opening is smaller than the width inside the bag.

[0010] Furthermore, the two branch ropes are respectively fixed to the air duct bag by sewing.

[0011] Furthermore, one end of the fixing rope is formed with an annular sleeve for connecting the telescopic rod.

[0012] Furthermore, the driving device is a pneumatic cylinder, a hydraulic cylinder, or a linear motor.

[0013] By adopting the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0014] This design, by incorporating a second exhaust port and a deflation valve, allows for adjustment of the airbag's deflation speed based on whether the occupant is wearing a seatbelt. When the occupant is not wearing a seatbelt, the deflation valve opens, and gas is simultaneously expelled through both the first and second exhaust ports, accelerating the deflation process and reducing the internal pressure of the airbag. This rapid deflation creates a softer cushioning surface within the airbag, effectively absorbing high-speed impact forces and reducing injuries to the occupant's head, neck, and other areas, thus enhancing the protection for unbelted occupants. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the unfolded planar structure of the air-guiding bag in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the air-guiding bag in the folded direction in this utility model;

[0019] Figure 4 This is a schematic diagram of the assembly of the fixing rope, air guide bag and telescopic rod in this utility model;

[0020] Figure 5 This is a schematic diagram of the structure in this utility model where the telescopic rod and the fixed rope are separated;

[0021] In the diagram: airbag body-1, first exhaust port-11, air guide bag-2, opening-20, first suture part-21, second suture part-22, fixing rope-3, branch rope-31, ring sleeve interface-32, second exhaust port-4, telescopic rod-5. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are only for illustrating the present invention and do not limit the scope of the present invention. Similarly, the following embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0023] like Figures 1 to 5 As shown, this solution provides an airbag with a vent valve.

[0024] Please see Figures 1 to 5 The system includes: an airbag body 1, with a first exhaust port 11 at one end and a second exhaust port 4 at the other end. The second exhaust port 4 is equipped with a deflation valve, which includes an air guide bag 2 and a fixing rope 3. The air guide bag 2 is fixedly mounted outside the second exhaust port 4. Preferably, the air guide bag 2 is fixed to the airbag body 1 by sewing. One end of the air guide bag 2 has an opening 20, and the second exhaust port 4 communicates with the opening 20. One end of the fixing rope 3 is divided into at least two strands, forming two branch ropes 31, which are respectively fixed to both sides of the opening 20. Preferably, the two branch ropes 31 are respectively fixed to the air guide bag 2 by sewing. The fixing rope 3 can be an elastic rope or a non-elastic rope. The system also includes a telescopic rod 5, with one end of the fixing rope 3 detachably tightened and fitted onto the telescopic rod 5. Preferably, one end of the fixing rope 3 forms an annular sleeve interface 32 for connecting the telescopic rod 5. The telescopic rod 5 is equipped with a drive device (not shown) for its extension and retraction; the drive device is a pneumatic cylinder, a hydraulic cylinder, or a linear motor. The pneumatic cylinder, hydraulic cylinder, or linear motor are direct applications of existing technology, and their working principles will not be described in detail here. The telescopic rod 5 and the drive device are located at the end opposite to the airbag body 1. The telescopic rod 5 and the drive device can be fixed inside the housing (not shown) used to accommodate the airbag body 1, or they can be located outside the gas generator (not shown). Their specific positions are not limited here, as long as the fixing rope 3 can be detachably tightened and sleeved on the telescopic rod 5.

[0025] When the fixing rope 3 is attached to the telescopic pole 5, the opening 20 is closed; when the fixing rope 3 is separated from the telescopic pole 5, the opening 20 is open. The electronic control system monitors in real time whether the occupant has fastened their seat belt (not shown) via a seat belt sensor (not shown). The seat belt sensor is usually installed on the seat belt buckle and can detect the buckle status. When the sensor detects that the seat belt is not fastened, the electronic control system immediately sends a signal to the drive device (such as a pneumatic cylinder, hydraulic cylinder, or linear motor). The drive device starts and controls the telescopic pole 5 to retract, causing the fixing rope 3 to separate from the telescopic pole 5, thereby opening the second exhaust port 4. When the sensor detects that the seat belt is fastened, the electronic control system does not trigger the drive device. The telescopic pole 5 remains in place, the fixing rope 3 continues to tighten the opening 20 of the air vent 2, the second exhaust port 4 remains closed, and gas is only discharged through the first exhaust port 11.

[0026] Please see Figure 2 and Figure 3 Before the air bag 2 is folded in half, it is in a hexagonal plane. The air bag 2 has a first sewing part 21 on each side. The air bag 2 is folded in half and the first sewing parts 21 on both sides are sewn. The air bag 2 has a second sewing part 22 on each side of the opening 20. The two branch ropes 31 are sewn to the two second sewing parts 22 respectively.

[0027] Please see Figures 1 to 5 The air duct has a narrow opening and wide cavity structure, with the width of the opening 20 being smaller than the width inside the bag.

[0028] Working principle:

[0029] When occupants are wearing seat belts:

[0030] When a car collision occurs and the occupants are wearing seat belts, the electronic control system detects that the seat belts are fastened through the seat belt sensor. At this time, the control system will not trigger the opening mechanism of the bleed valve.

[0031] The gas generated by the gas generator is mainly discharged through the first exhaust port 11 of the airbag body 1. Since the occupant is restrained by the seat belt, the forward impact speed is relatively slow. The airbag slowly exhausts gas through the first exhaust port 11, forming a relatively soft buffer surface, which effectively absorbs the impact force of the occupant and avoids the airbag rebound causing secondary injury to the occupant.

[0032] When passengers are not wearing seat belts:

[0033] When a car is involved in a collision and the occupants are not wearing seat belts, the electronic control system detects that the seat belts are not fastened through the seat belt sensor. At this time, the control system will immediately trigger the opening mechanism of the vent valve.

[0034] The control system controls the telescopic rod 5 to retract via a drive device such as a pneumatic cylinder, hydraulic cylinder or linear motor, so that the fixing rope 3 separates from the telescopic rod 5. The separation of the fixing rope 3 causes the opening 20 of the air bag 2 to open, and the gas in the airbag body 1 is discharged simultaneously through the first exhaust port 11 and the second exhaust port 4.

[0035] With the opening of the second exhaust port 4, the airbag's exhaust speed increases, and the pressure inside the airbag decreases rapidly, forming a softer buffer surface. In this way, even if the occupant is thrown forward at a high speed, the airbag can effectively absorb the impact force and prevent the airbag from rebounding and causing secondary injury to the occupant.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An air bag with a deflation valve, comprising: Airbag body (1), one end of the airbag body (1) is provided with a first exhaust port (11), characterized in that the other end of the airbag body (1) is also provided with a second exhaust port (4), the second exhaust port (4) is equipped with a deflation valve, the deflation valve comprises a gas guide bag (2) and a fixed rope (3), the gas guide bag (2) is fixedly covered outside the second exhaust port (4), one end of the gas guide bag (2) is provided with an opening (20), the second exhaust port (4) is in communication with the opening (20); one end of the fixed rope (3) is divided into at least two strands, forming two branch ropes (31), the two branch ropes (31) are respectively fixed on both sides of the opening (20); further comprising a telescopic rod (5), one end of the fixed rope (3) is detachably tightly sleeved on the telescopic rod (5), the telescopic rod (5) is equipped with a driving device for its telescopic extension; when the fixed rope (3) is sleeved on the telescopic rod (5), the opening (20) is in a closed state, when the fixed rope (3) is separated from the telescopic rod (5), the opening (20) is in an open state.

2. An air bag with a deflation valve as defined in claim 1, wherein The gas guide bag (2) is fixed to the airbag body (1) by sewing.

3. An air bag with a deflation valve as defined in claim 1, wherein The gas guide bag is a narrow opening wide cavity structure, the width of the opening (20) is less than the width of the bag.

4. An air bag with a deflation valve as defined in claim 1, wherein The two branch ropes (31) are respectively fixed to the gas guide bag (2) by sewing.

5. An air bag with a deflation valve as defined in claim 1 wherein, One end of the fixed rope (3) is formed with a ring-shaped sleeve interface (32) for connecting the telescopic rod (5).

6. An air bag with a deflation valve as defined in claim 1 wherein, The driving device is a pneumatic cylinder, a hydraulic cylinder or a linear motor.

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